Issued Patents 1982
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4356058 | Process for the reprocessing of papers | Siegbert Fischer | 1982-10-26 |
| 4332638 | Method and apparatus for the recovery of a suspension of fibrous material from mixed waste paper | Eberhard Mauer, Siegbert Fischer | 1982-06-01 |
| 4317701 | Apparatus for treating waste-paper | Holzwirt Siegbert/Fischer | 1982-03-02 |